fustic /ˈfʌstɪk/ noun4 •A tropical American tree (Maclura tinctoria), whose wood produces a yellow dye. •A Eurasian smoketree (Cotinus coggygria), whose wood produces an orange dye. •A yellow dye obtained from the wood of these trees. •Wood of these trees.Fustic will also dye a yellow with alum for a mordaunt, either on woolen or silk, but it makes a poor color in comparison with the Quercitron, (American yellow oak bark.) — 1847 formsfustics